Answer: Male with extra X: infertile, some female features.
- A Female with an extra X chromosome and tall stature
- B Male with extra X: infertile, some female features
- C Normal male with standard XY karyotype
- D Turner syndrome arising from a missing X chromosome
Correct answer: B. Male with extra X: infertile, some female features
Explanation: Klinefelter syndrome: XXY males. Usually taller, infertile (azoospermia), may have gynecomastia. Caused by nondisjunction.
Punnett square for a monohybrid cross between two heterozygous (Tt) parents, showing the 3:1 phenotypic ratio predicted by Mendel's Law of Segregation.
Concept context
Mendel's laws, inheritance patterns, DNA structure, and molecular biology. Core of NEET biology.
Read the full Principles of Inheritance and Variation notes →